Entrance switch



Sept. 22, 1925. 1,554,459

L. E. NORQUIST ENTRANCE SWITCH Filed Sept. 5. 1924 M-gi m w Snuewfoz Zesier 1E, floryuisf.

Patented Sept. 22, 1925.

UNITED STATES LESTER E. NDRQUIST, OF DENVER, COLORADO.

ENTRANCE SWITCH.

Application filed Eeptemher 5, 1824. Seria1 No. 736,055.

To all whom it may concern-.-

Be it known that I, Lnsrnn E. Nonoors'r, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Entrance Switches; and I do declare the following to be a full, clear, and exact descrip tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, an d to the characters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in electric switches and has reference more particularly to a new and improved entrance switch.

It is the object of this invention to produce a switch of simple and substantial design that can be used in connection with cutout cabinets of usual construction, and which shall have means adapted to interlock with the cover of the cabinet in such a manner that the cover cannot be opened while the switch is in closed position.

The above and other objects that will become apparent as the description proceeds, are attained by means of a construction that I will now proceed to describe in detail, reference for this purpose being had to the accompanying drawings, in which the pre ferred embodiment thereof is shown, and in which:

Fig. 1 is a vertical section through a portion of a cut-out cabinet and shows my switch in place therein;

Fig. 2 is a side elevation. of the switch taken along line 2, Fig. i;

Fig. 3 is a section taken on line 33, Fig. 1; and

Fig. 4 is a side elevation taken along line 4-4:, Fig. 8.

Numeral 1 designates a metal cut-out box of ordinary construction having a trim 2 and a cover 3. The cover is hinged in theusual way. Both the cover and the trim are provided with notches i which form an elongated opening whose purpose will here inafter appear. Secured to the bottom of the box 1, as by screws 5, I secure my combined switch and cut-out, which I will now describe.

This cut-out comprises a porcelain mem ber having a base 6 "mom which. projects a perpendicular wall 7 to which the switch members and the fuse plug sockets are secured. On one side the wall 7 has two cupshaped cavities, each of which contains a screw shell contact 8, which is electrically connected to the terminal 9. The screw shell contacts are held in place by a screw 10 whose head 11 is insulated from the shell and forms a center contact. Screws 10 have threaded engagement with the switch con tact clips 12 and serve to hold the latter, as well as the screw shells, in place. Secured to the wall 7 adjacent the base 6 are switch contact clips 13 which are held in place by screws 14;.

These clips have their sides perforated for the reception of a pivot pin 14 about which the blades 15 oscillate. One side member of each clip has a portion 16 that projects toward the base and has its end bent outwardly into parallel relation with the latter. Binding screws 17 are threadedly connected to the outwardly bent ends and serve to clamp the ends of the service wires (not shown). The free ends of the switch blades 15 are connected by means of a bar 18 of insulating material. At a point intermediate the blades 15, I secure a bar 19, preferably of insulating material, to the outer end of which I secure a handle 20. It is evident that the operator, by grasping the handle 20, can movethe switch from open to closed position and vice versa. A barrier 21 is provided between the contact clips 13, and a similar barrier 22 separates the terminals 9.

The switch is secured to the bottom of the cut-out box in the manner shown in Fig. 1 and is so located with respect to the cover and the trim, that when the switch is in closed position, the bar .19 will extend through the notch 4 in the edge of the cover. A plate 23 is attached to the bar 19 and is held against the outside of the box by means of a spring 24. The purpose of this plate is to close the oblong opening and prevent the entry of dust and dirt, as well as to prevent lire from shooting out in case of a short circuit Or the blowing of a fuse.

Before the cover 3 can be opened, it is necessary to move the bar 19 downwardly until it enters that portion of the notch 4-, that is located wholly in the trim. This opens the switch and releases the cover so that the latter can be opened. The interlock feature between the cover and the switch insures that the cover cannot be opened until after the switch has been moved to open position.

From the above, it will be seen that by means of my simple switch, I can obtain an interlock etlect that has heretofore been obtained only by specially constructed cab inets and switches of complicated andexpensive design. In addition to the interlockingefeature, my switch also eitl'ects a considerable saving in the cost of the cabinets, for the reason that by having theswitch in a plane vertical with respect to the bottom of the cabinet, when in closed position, it takes up less room and makes it possible to use a smaller cabinet.

lilaving now described my invention, what I claim as new, is:

A combined cut-out and entranceswitch comprising in eombinaton, a body member ofinsulating material having a base, a wall projecting perpendicularly from one side thereof, said wall having cylindrical recesses on one sidefor the reception of plug fuses, a knife switch secured to the other side of the wall, a screw shell and a center contact in each recess, ascrew adapted to extend through the wall, a switch contact clip operatively related to each screw and held in place thereby, a pair of contact clips secured to the wall near the base, said ltlStflltlll'lQtl clips having terminals to which service wires may be connected, switch blades pivoted to the last-named clips and adapted to .engage the first-named clips, an insulating bar connecting the free ends of the switch blades, and a handle secured to said bar, said handle being adapted to extend through a slot in a cabinet CQVGlfliOl the purpose of holding the latter against being openedwhile the switch is closed.

In testimony whereof I afiix my signature.

LESTER E. NOR-QUIST. 

